Subcutaneous GLP-1 pens must be delivered into the adipose layer beneath the skin. Repeating the exact same spot causes lipohypertrophy (rubbery subcutaneous nodules) that impairs drug bioavailability.

The 6 FDA/EMA Approved Subcutaneous Zones

  1. Left & Right Abdomen: At least 2 inches (5 cm) away from the navel.
  2. Left & Right Front/Outer Thigh: Middle third of the thigh while seated.
  3. Left & Right Back of Upper Arm: Outer posterior triceps area.